SHEET-TYPE OHMIC HEATING ELEMENT
First Claim
1. A sheet-type ohmic heating element, comprising a substrate sheet having applied thereon a layer of PTC (positive temperature coefficient) material and a protective cover sheet laid over said layer of PTC material, said protective cover sheet and said layer of PTC material being arranged in non-adhesive contact with each other, said protective cover sheet extending beyond the boundary of said layer of PTC material and being affixed to said substrate sheet circumferentially around the boundary of said layer of PTC material.
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Accused Products
Abstract
A sheet-type ohmic heating element (10) comprises a substrate sheet (12) having applied thereon a layer of PTC material (14) and a protective cover sheet (16) laid over the layer of PTC material. The protective cover sheet extends beyond the boundary of the layer of PTC material and is affixed to the substrate sheet circumferentially around the boundary of the layer of PTC material. The protective cover sheet and the layer of PTC material are arranged in non-adhesive contact with each other.
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Citations
12 Claims
- 1. A sheet-type ohmic heating element, comprising a substrate sheet having applied thereon a layer of PTC (positive temperature coefficient) material and a protective cover sheet laid over said layer of PTC material, said protective cover sheet and said layer of PTC material being arranged in non-adhesive contact with each other, said protective cover sheet extending beyond the boundary of said layer of PTC material and being affixed to said substrate sheet circumferentially around the boundary of said layer of PTC material.
Specification